Watermelon are large vining plants that need lots of sun, water, and room to ramble in full sun.
Cultural tips for growing watermelon, UC IPM
Pest management
Pests and disorders of watermelon, UC IPM
Planting
- Transplant or direct seed in May to June.
- For best results, wait until daytime temperatures are regularly over 75°F and soil temperature is over 70°F.
- If growing your own seedlings, start the seeds 4 weeks before you want to plant.
- Use floating row covers to protect seedlings and transplants from cool air temperatures and early insect pests. Remove the covers when plants start to blossom.
Harvesting
- July to October, depending on variety.
- Like all members of the cucurbit family, watermelon have male and female flowers. Encourage bees with companion flower planting or consider hand pollinating female flowers.
More links
- 2006 watermelon trial
- Fruit Set Problems in Squash, Melons, and Cucumbers In Home Gardens
- Harvest and Storage
- Watermelon production in California
Recommended varieties for Santa Clara County*
| Sweet Siberian | Red flesh, and dark green seeds. 83 days. Very prolific. |
| Osh Kirgizia | Russian variety with sweet pink-red flesh. Weight from 10 to 15 pounds, round shape, pink flesh, small brown seeds, some reddish. 95 days. |
| Orangeglo | Large 20 to 30-pound oblong fruit, very sweet crisp and flavorful with deep orange flesh. The rind is light-green with jagged dark green strips. Harvest period was 105 to 150 days from seeding. |
Other recommended varieties: Charleston Gray, Moon & Stars
* Many other varieties may also do well here in Santa Clara County. This list is based on UC Master Gardener trials, taste tests, and feedback from local growers.